I should have mentioned that i meant if i had applied carb heat at the initial engine out and verified that it was not carb heat or anything on the magic engine out checklist and i would certainly never run a fuel tank dry.Got a wee bit of common sense i,E,common sense=genius in its working clothes.Was just wondering what are the chances of it starting or are there any studies about this if having completed the checklist flow.e.g the inverted L on the c172 or the engine out checklist and found everything ok.Thanks for the replies.Desmond.